Fish finder trolling motor interference

I have a Garmin striker 7 with di/si. Transducer is mounted to the trolling motor. The unit works great when the trolling motor is off, but when I start it I get bad interference.

Rules out the basics first.

Is your graph running on a separate battery?

Do you have a ferrite ring installed?

Are your power wires from the trolling motor as isolated as possible from the power and any other networking/ducer wires from the graph?

It’s easy and clean looking to run/rig wires together, but sometimes that can cause issues of it’s own.

What is a fertile ring?

robby wrote:

What is a fertile ring?

It’s a ring or block made of a ceramic material that snaps around a wire and blocks EMI interference between devices or power source and the device. Sometimes they’re called chokes.

Pat K wrote:

<div class=”d4p-bbt-quote-title”>robby wrote:</div>
What is a fertile ring?

It’s a ring or block made of a ceramic material that snaps around a wire and blocks EMI interference between devices or power source and the device. Sometimes they’re called chokes.

No, that would be a ferrite ring. Not quite sure what a fertile ring is though.

Are all of the batteries connected to an onboard charger? If so you might need to install a choke.

Eelpoutguy wrote:

No, that would be a ferrite ring. Not quite sure what a fertile ring is though.

I assumed robby was a victim of auto-correct.
I know I should never assume anything!